What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveBoth

LOINC Code 5198-7: HCV Ab IA Qn (S)

Name: LOINC Code 5198-7: HCV Ab IA Qn (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:35.574Z

5198-7 is a LOINC code used to identify HCV Ab IA Qn (S) in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Hepatitis C virus Ab. It is commonly used with the system or sample type Ser.

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Hepatitis C virus Ab. It is commonly used with the system or sample type Ser.

When is it used?

Used in lab systems, EHRs, and clinical data exchange.
May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
Status: ACTIVE
Order vs observation: Both
Method: IA

What it does not mean

The code identifies the observation or test, not the actual result.

Key facts

Hepatitis C virus Ab [Units/volume] in Serum by Immunoassay
Hepatitis C virus Ab
ABS; Aby; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; EIA; ELFA; ELISA; Enzyme immunoassay; HCV; HCVAB; Hep; Hep C; Hepatis; Hepatit; Hepatology; IAA; ID; Infectious Disease; InfectiousDisease; Liver; MEIA; Microbiology; Point in time; QNT; Quan; Quant; Quantitative; Random; Serum; SR; SUDS; UniversalLabOrders

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

HCV Ab IA Qn (S)Hepatitis C virus Ab [Units/volume] in Serum by ImmunoassayHCV Ab Ser IA-aCncHepatitis C virus AbMICROHepatitis C virus (HCV) antibody, BloodACnc

Frequently asked questions

Code details

Code5198-7

SystemLOINC

Display nameHCV Ab IA Qn (S)

DescriptionHepatitis C virus Ab

Short nameHCV Ab Ser IA-aCnc

ComponentHepatitis C virus Ab

PropertyACnc

TimingPt

System (specimen)Ser

ScaleQn

MethodIA

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0

Last changed2.73

Consumer names

Hepatitis C virus (HCV) antibody, Blood

Part names

Hepatitis C virus AbACncPtSerQnIAArbitrary ConcentrationPoint in time (spot)SerumImmunoassay

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.